package com.fanjia.es_demo.service;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.serializer.SerializeFilter;
import com.fanjia.es_demo.entity.Content;
import com.fanjia.es_demo.utils.HtmlParseUtil;
import org.elasticsearch.action.bulk.BulkRequest;
import org.elasticsearch.action.bulk.BulkResponse;
import org.elasticsearch.action.index.IndexRequest;
import org.elasticsearch.action.search.SearchRequest;
import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestHighLevelClient;
import org.elasticsearch.common.text.Text;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.index.query.QueryBuilders;
import org.elasticsearch.index.query.TermQueryBuilder;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.builder.SearchSourceBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
import org.elasticsearch.search.fetch.subphase.highlight.HighlightField;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author fanjia
 * @className ContentService
 * @description TODO
 * @date 2021/4/14 20:24
 */
@Service
public class ContentService {

    @Autowired
    private RestHighLevelClient restHighLevelClient;


    //存值
    public Boolean parseContent(String keywords) throws IOException {
        List<Content> contentList = HtmlParseUtil.parseJD(keywords);
        BulkRequest bulkRequest = new BulkRequest();
        bulkRequest.timeout("2m");
        for (int i =0;i<contentList.size();i++){
            bulkRequest.add(new IndexRequest("jd_goods")
                    .source(JSON.toJSONString(contentList.get(i)), XContentType.JSON));
        }

        BulkResponse bulk = restHighLevelClient.bulk(bulkRequest, RequestOptions.DEFAULT);
        return !bulk.hasFailures();

    }

    //搜索
    public List<Map<String,Object>> searchPage(String keyword, int pageNo, int pageSize) throws IOException {
        if (pageNo<=1){
            pageNo=1;
        }
        //条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);
        //精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title",keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));
        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        List<Map<String,Object>> list = new ArrayList<>();
        //解析结果
        for (SearchHit searchHit : searchResponse.getHits().getHits()){
            list.add(searchHit.getSourceAsMap());
        }

        return list;


    }

    //高亮
    public List<Map<String,Object>> searchPageHighlightBuilder(String keyword, int pageNo, int pageSize) throws IOException {
        if (pageNo<=1){
            pageNo=1;
        }
        //条件搜索
        SearchRequest searchRequest = new SearchRequest("jd_goods");
        SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
        //分页
        sourceBuilder.from(pageNo);
        sourceBuilder.size(pageSize);
        //精准匹配
        TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("title",keyword);
        sourceBuilder.query(termQueryBuilder);
        sourceBuilder.timeout(new TimeValue(60, TimeUnit.SECONDS));

        //高亮
        HighlightBuilder highlightBuilder = new HighlightBuilder();
        highlightBuilder.field("title");
        highlightBuilder.requireFieldMatch(false);
        highlightBuilder.preTags("<span style='color:red'> ");
        highlightBuilder.postTags("</span>");
        sourceBuilder.highlighter(highlightBuilder);


        //执行搜索
        searchRequest.source(sourceBuilder);
        SearchResponse searchResponse = restHighLevelClient.search(searchRequest, RequestOptions.DEFAULT);

        List<Map<String,Object>> list = new ArrayList<>();
        //解析结果
        for (SearchHit searchHit : searchResponse.getHits()){
            Map<String, HighlightField> highlightFields = searchHit.getHighlightFields();
            HighlightField title = highlightFields.get("title");
            Map<String, Object> sourceAsMap = searchHit.getSourceAsMap();
             //高亮
            if(title != null){
                Text[] fragments = title.fragments();
                String n_title = "";
                for (Text text : fragments){
                    System.out.println(text);
                    n_title +=text;
                }
                sourceAsMap.put("title",n_title);
            }


            list.add(sourceAsMap);
        }

        return list;


    }















}
